在前端我的项目咱们经常须要操作字符串 工夫格局 输入框限度输出精度和长度 ，上面对罕用的办法封装
封装的益处:
1.精简代码 代码更加标准
2.多反复用，进步开发效率
3.如果呈现相应的bug也能‘对立的’批改，而不须要到每个js或页面挨个批改
/** * @description 罕用验证 如是否字符串 是否函数 是否手机号 邮箱等等 是否pc 是否IOS零碎 */var Kencheck = { isString: function(o) { //是否字符串 return Object.prototype.toString.call(o).slice(8, -1) === 'String' }, isNumber: function(o) { //是否数字 return Object.prototype.toString.call(o).slice(8, -1) === 'Number' }, isBoolean: function(o) { //是否boolean return Object.prototype.toString.call(o).slice(8, -1) === 'Boolean' }, isFunction: function(o) { //是否函数 return Object.prototype.toString.call(o).slice(8, -1) === 'Function' }, isNull: function(o) { //是否为null return Object.prototype.toString.call(o).slice(8, -1) === 'Null' }, isUndefined: function(o) { //是否undefined return Object.prototype.toString.call(o).slice(8, -1) === 'Undefined' }, isObj: function(o) { //是否对象 return Object.prototype.toString.call(o).slice(8, -1) === 'Object' }, isArray: function(o) { //是否数组 return Object.prototype.toString.call(o).slice(8, -1) === 'Array' }, isDate: function(o) { //是否工夫 return Object.prototype.toString.call(o).slice(8, -1) === 'Date' }, isRegExp: function(o) { //是否正则 return Object.prototype.toString.call(o).slice(8, -1) === 'RegExp' }, isError: function(o) { //是否谬误对象 return Object.prototype.toString.call(o).slice(8, -1) === 'Error' }, isSymbol: function(o) { //是否Symbol函数 return Object.prototype.toString.call(o).slice(8, -1) === 'Symbol' }, isPromise: function(o) { //是否Promise对象 return Object.prototype.toString.call(o).slice(8, -1) === 'Promise' }, isSet: function(o) { //是否Set对象 return Object.prototype.toString.call(o).slice(8, -1) === 'Set' }, isFalse: function(o) { if (!o || o === 'null' || o === 'undefined' || o === 'false' || o === 'NaN') return true return false }, isTrue: function(o) { return !this.isFalse(o) }, isIos: function() { var u = navigator.userAgent; if (u.indexOf('Android') > -1 || u.indexOf('Linux') > -1) { //安卓手机 // return "Android"; return false } else if (u.indexOf('iPhone') > -1) { //苹果手机 // return "iPhone"; return true } else if (u.indexOf('iPad') > -1) { //iPad // return "iPad"; return false } else if (u.indexOf('Windows Phone') > -1) { //winphone手机 // return "Windows Phone"; return false } else { return false } }, isPC: function() { //是否为PC端 var userAgentInfo = navigator.userAgent; var Agents = ["Android", "iPhone", "SymbianOS", "Windows Phone", "iPad", "iPod" ]; var flag = true; for (var v = 0; v < Agents.length; v++) { if (userAgentInfo.indexOf(Agents[v]) > 0) { flag = false; break; } } return flag; }, browserType:function() { var userAgent = navigator.userAgent; //获得浏览器的userAgent字符串 var isOpera = userAgent.indexOf("Opera") > -1; //判断是否Opera浏览器 var isIE = userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera; //判断是否IE浏览器 var isIE11 = userAgent.indexOf('Trident') > -1 && userAgent.indexOf("rv:11.0") > -1; var isEdge = userAgent.indexOf("Edge") > -1 && !isIE; //判断是否IE的Edge浏览器 var isFF = userAgent.indexOf("Firefox") > -1; //判断是否Firefox浏览器 var isSafari = userAgent.indexOf("Safari") > -1 && userAgent.indexOf("Chrome") == -1; //判断是否Safari浏览器 var isChrome = userAgent.indexOf("Chrome") > -1 && userAgent.indexOf("Safari") > -1; //判断Chrome浏览器 if (isIE) { var reIE = new RegExp("MSIE (\\d+\\.\\d+);"); reIE.test(userAgent); var fIEVersion = parseFloat(RegExp["$1"]); if (fIEVersion == 7) return "IE7" else if (fIEVersion == 8) return "IE8"; else if (fIEVersion == 9) return "IE9"; else if (fIEVersion == 10) return "IE10"; else return "IE7以下" //IE版本过低 } if (isIE11) return 'IE11'; if (isEdge) return "Edge"; if (isFF) return "FF"; if (isOpera) return "Opera"; if (isSafari) return "Safari"; if (isChrome) return "Chrome"; }, checkStr: function(str, type) { switch (type) { case 'phone': //手机号码 return /^1[3|4|5|6|7|8|9][0-9]{9}$/.test(str); case 'tel': //座机 return /^(0\d{2,3}-\d{7,8})(-\d{1,4})?$/.test(str); case 'card': //身份证 return /(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/.test(str); case 'pwd': //明码以字母结尾，长度在6~18之间，只能蕴含字母、数字和下划线 return /^[a-zA-Z]\w{5,17}$/.test(str) case 'postal': //邮政编码 return /[1-9]\d{5}(?!\d)/.test(str); case 'QQ': //QQ号 return /^[1-9][0-9]{4,9}$/.test(str); case 'email': //邮箱 return /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/.test(str); case 'money': //金额(小数点2位) return /^\d*(?:\.\d{0,2})?$/.test(str); case 'URL': //网址 return /(http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?/.test(str) case 'IP': //IP return /((?:(?:25[0-5]|2[0-4]\\d|[01]?\\d?\\d)\\.){3}(?:25[0-5]|2[0-4]\\d|[01]?\\d?\\d))/.test(str); case 'date': //日期工夫 return /^(\d{4})\-(\d{2})\-(\d{2}) (\d{2})(?:\:\d{2}|:(\d{2}):(\d{2}))$/.test(str) || /^(\d{4})\-(\d{2})\-(\d{2})$/.test(str) case 'number': //数字 return /^[0-9]$/.test(str); case 'english': //英文 return /^[a-zA-Z]+$/.test(str); case 'chinese': //中文 return /^[\u4E00-\u9FA5]+$/.test(str); case 'lower': //小写 return /^[a-z]+$/.test(str); case 'upper': //大写 return /^[A-Z]+$/.test(str); case 'HTML': //HTML标记 return /<("[^"]*"|'[^']*'|[^'">])*>/.test(str); default: return true; } }, // 严格的身份证校验 isCardID: function(sId) { if (!/(^\d{15}$)|(^\d{17}(\d|X|x)$)/.test(sId)) { alert('你输出的身份证长度或格局谬误') return false } //身份证城市 var aCity = { 11: "北京", 12: "天津", 13: "河北", 14: "山西", 15: "内蒙古", 21: "辽宁", 22: "吉林", 23: "黑龙江", 31: "上海", 32: "江苏", 33: "浙江", 34: "安徽", 35: "福建", 36: "江西", 37: "山东", 41: "河南", 42: "湖北", 43: "湖南", 44: "广东", 45: "广西", 46: "海南", 50: "重庆", 51: "四川", 52: "贵州", 53: "云南", 54: "西藏", 61: "陕西", 62: "甘肃", 63: "青海", 64: "宁夏", 65: "新疆", 71: "台湾", 81: "香港", 82: "澳门", 91: "国外" }; if (!aCity[parseInt(sId.substr(0, 2))]) { alert('你的身份证地区非法') return false } // 出生日期验证 var sBirthday = (sId.substr(6, 4) + "-" + Number(sId.substr(10, 2)) + "-" + Number(sId.substr(12, 2))).replace( /-/g, "/"), d = new Date(sBirthday) if (sBirthday != (d.getFullYear() + "/" + (d.getMonth() + 1) + "/" + d.getDate())) { alert('身份证上的出生日期非法') return false } // 身份证号码校验 var sum = 0, weights = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2], codes = "10X98765432" for (var i = 0; i < sId.length - 1; i++) { sum += sId[i] * weights[i]; } var last = codes[sum % 11]; //计算出来的最初一位身份证号码 if (sId[sId.length - 1] != last) { alert('你输出的身份证号非法') return false } return true }} /** * @description 操作工夫 */var KenDate ={ /** * 格式化工夫 * * @param {time} 工夫 * @param {cFormat} 格局 * @return {String} 字符串 * * @example formatTime('2018-1-29', '{y}/{m}/{d} {h}:{i}:{s}') // -> 2018/01/29 00:00:00 */ formatTime:function(time, cFormat) { if (arguments.length === 0) return null if ((time + '').length === 10) { time = +time * 1000 } var format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}', date if (typeof time === 'object') { date = time } else { date = new Date(time) } var formatObj = { y: date.getFullYear(), m: date.getMonth() + 1, d: date.getDate(), h: date.getHours(), i: date.getMinutes(), s: date.getSeconds(), a: date.getDay() } var time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => { var value = formatObj[key] if (key === 'a') return ['一', '二', '三', '四', '五', '六', '日'][value - 1] if (result.length > 0 && value < 10) { value = '0' + value } return value || 0 }) return time_str }, /** * 返回指定长度的月份汇合 * * @param {time} 工夫 * @param {len} 长度 * @param {direction} 方向： 1: 前几个月; 2: 后几个月; 3:前后几个月 默认 3 * @return {Array} 数组 * * @example getMonths('2018-1-29', 6, 1) // -> ["2018-1", "2017-12", "2017-11", "2017-10", "2017-9", "2017-8", "2017-7"] */ getMonths:function(time, len, direction) { var mm = new Date(time).getMonth(), yy = new Date(time).getFullYear(), direction = isNaN(direction) ? 3 : direction, index = mm; var cutMonth = function(index) { if ( index <= len && index >= -len) { return direction === 1 ? formatPre(index).concat(cutMonth(++index)): direction === 2 ? formatNext(index).concat(cutMonth(++index)):formatCurr(index).concat(cutMonth(++index)) } return [] } var formatNext = function(i) { var y = Math.floor(i/12), m = i%12 return [yy+y + '-' + (m+1)] } var formatPre = function(i) { var y = Math.ceil(i/12), m = i%12 m = m===0 ? 12 : m return [yy-y + '-' + (13 - m)] } var formatCurr = function(i) { var y = Math.floor(i/12), yNext = Math.ceil(i/12), m = i%12, mNext = m===0 ? 12 : m return [yy-yNext + '-' + (13 - mNext),yy+y + '-' + (m+1)] } // 数组去重 var unique = function(arr) { if ( Array.hasOwnProperty('from') ) { return Array.from(new Set(arr)); }else{ var n = {},r=[]; for(var i = 0; i < arr.length; i++){ if (!n[arr[i]]){ n[arr[i]] = true; r.push(arr[i]); } } return r; } } return direction !== 3 ? cutMonth(index) : unique(cutMonth(index).sort(function(t1, t2){ return new Date(t1).getTime() - new Date(t2).getTime() })) }, /** * 返回指定长度的天数汇合 * * @param {time} 工夫 * @param {len} 长度 * @param {direction} 方向： 1: 前几天; 2: 后几天; 3:前后几天 默认 3 * @return {Array} 数组 * * @example date.getDays('2018-1-29', 6) // -> ["2018-1-26", "2018-1-27", "2018-1-28", "2018-1-29", "2018-1-30", "2018-1-31", "2018-2-1"] */ getDays:function(time, len, diretion) { var tt = new Date(time) var getDay = function(day) { var t = new Date(time) t.setDate(t.getDate() + day) var m = t.getMonth()+1 return t.getFullYear()+'-'+m+'-'+t.getDate() } var arr = [] if (diretion === 1) { for (var i = 1; i <= len; i++) { arr.unshift(getDay(-i)) } }else if(diretion === 2) { for (var i = 1; i <= len; i++) { arr.push(getDay(i)) } }else { for (var i = 1; i <= len; i++) { arr.unshift(getDay(-i)) } arr.push(tt.getFullYear()+'-'+(tt.getMonth()+1)+'-'+tt.getDate()) for (var i = 1; i <= len; i++) { arr.push(getDay(i)) } } return diretion === 1 ? arr.concat([tt.getFullYear()+'-'+(tt.getMonth()+1)+'-'+tt.getDate()]) : diretion === 2 ? [tt.getFullYear()+'-'+(tt.getMonth()+1)+'-'+tt.getDate()].concat(arr) : arr }, /** * @param {s} 秒数 * @return {String} 字符串 * * @example formatHMS(3610) // -> 1h0m10s */ formatHMS:function(s) { var str = '' if (s > 3600) { str = Math.floor(s/3600)+'h'+Math.floor(s%3600/60)+'m'+s%60+'s' }else if(s > 60) { str = Math.floor(s/60)+'m'+s%60+'s' }else{ str = s%60+'s' } return str }, /*获取某月有多少天*/ getMonthOfDay:function(time) { var date = new Date(time) var year = date.getFullYear() var mouth = date.getMonth() + 1 var days //当月份为二月时，依据平年还是非平年判断天数 if (mouth == 2) { days = (year%4==0 && year%100==0 && year%400==0) || (year%4==0 && year%100!=0) ? 28 : 29 } else if (mouth == 1 || mouth == 3 || mouth == 5 || mouth == 7 || mouth == 8 || mouth == 10 || mouth == 12) { //月份为：1,3,5,7,8,10,12 时，为大月.则天数为31； days = 31 } else { //其余月份，天数为：30. days = 30 } return days }, /*获取某年有多少天*/ getYearOfDay:function(time) { var firstDayYear = this.getFirstDayOfYear(time); var lastDayYear = this.getLastDayOfYear(time); var numSecond = (new Date(lastDayYear).getTime() - new Date(firstDayYear).getTime())/1000; return Math.ceil(numSecond/(24*3600)); }, /*获取某年的第一天*/ getFirstDayOfYear:function(time) { var year = new Date(time).getFullYear(); return year + "-01-01 00:00:00"; }, /*获取某年最初一天*/ getLastDayOfYear:function(time) { var year = new Date(time).getFullYear(); var dateString = year + "-12-01 00:00:00"; var endDay = this.getMonthOfDay(dateString); return year + "-12-" + endDay + " 23:59:59"; }, /*获取某个日期是当年中的第几天*/ getDayOfYear:function(time) { var firstDayYear = this.getFirstDayOfYear(time); var numSecond = (new Date(time).getTime() - new Date(firstDayYear).getTime())/1000; return Math.ceil(numSecond/(24*3600)); }, /*获取某个日期在这一年的第几周*/ getDayOfYearWeek:function(time) { var numdays = this.getDayOfYear(time); return Math.ceil(numdays / 7); }} /** * @description 操作数组 */var KenArray ={ /*判断一个元素是否在数组中*/ contains:function(arr, val) { return arr.indexOf(val) != -1 ? true : false; }, /** * @param {arr} 数组 * @param {fn} 回调函数 * @return {undefined} */ each:function(arr, fn) { fn = fn || Function; var a = []; var args = Array.prototype.slice.call(arguments, 1); for(var i = 0; i < arr.length; i++) { var res = fn.apply(arr, [arr[i], i].concat(args)); if(res != null) a.push(res); } }, /** * @param {arr} 数组 * @param {fn} 回调函数 * @param {thisObj} this指向 * @return {Array} */ map:function(arr, fn, thisObj) { var scope = thisObj || window; var a = []; for(var i = 0, j = arr.length; i < j; ++i) { var res = fn.call(scope, arr[i], i, this); if(res != null) a.push(res); } return a; }, /** * @param {arr} 数组 * @param {type} 1：从小到大 2：从大到小 3：随机 * @return {Array} */ sort:function(arr, type = 1) { return arr.sort( (a, b) => { switch(type) { case 1: return a - b; case 2: return b - a; case 3: return Math.random() - 0.5; default: return arr; } }) }, /*去重*/ unique:function(arr) { if ( Array.hasOwnProperty('from') ) { return Array.from(new Set(arr)); }else{ var n = {},r=[]; for(var i = 0; i < arr.length; i++){ if (!n[arr[i]]){ n[arr[i]] = true; r.push(arr[i]); } } return r; } // 注：下面 else 外面的排重并不能辨别 2 和 '2'，但能缩小用indexOf带来的性能,临时没找到代替的办法。。。 /* 正确排重 if ( Array.hasOwnProperty('from') ) { return Array.from(new Set(arr)) }else{ var r = [], NaNBol = true for(var i=0; i < arr.length; i++) { if (arr[i] !== arr[i]) { if (NaNBol && r.indexOf(arr[i]) === -1) { r.push(arr[i]) NaNBol = false } }else{ if(r.indexOf(arr[i]) === -1) r.push(arr[i]) } } return r } */ }, /*求两个汇合的并集*/ union:function(a, b) { var newArr = a.concat(b); return this.unique(newArr); }, /*求两个汇合的交加*/ intersect:function(a, b) { var _this = this; a = this.unique(a); return this.map(a, function(o) { return _this.contains(b, o) ? o : null; }); }, /*删除其中一个元素*/ remove:function(arr, ele) { var index = arr.indexOf(ele); if(index > -1) { arr.splice(index, 1); } return arr; }, /*将类数组转换为数组的办法*/ formArray:function(ary) { var arr = []; if(Array.isArray(ary)) { arr = ary; } else { arr = Array.prototype.slice.call(ary); }; return arr; }, /*最大值*/ max:function(arr) { return Math.max.apply(null, arr); }, /*最小值*/ min:function(arr) { return Math.min.apply(null, arr); }, /*求和*/ sum:function(arr) { return arr.reduce( (pre, cur) => { return pre + cur }) }, /*平均值*/ average:function(arr) { return this.sum(arr)/arr.length }} var KenString ={ /** * 去除空格 * @param {str} * @param {type} * type: 1-所有空格 2-前后空格 3-前空格 4-后空格 * @return {String} */ trim:function (str, type) { type = type || 1 switch (type) { case 1: return str.replace(/\s+/g, ""); case 2: return str.replace(/(^\s*)|(\s*$)/g, ""); case 3: return str.replace(/(^\s*)/g, ""); case 4: return str.replace(/(\s*$)/g, ""); default: return str; } }, /** * @param {str} * @param {type} * type: 1:首字母大写 2：首页母小写 3：大小写转换 4：全副大写 5：全副小写 * @return {String} */ changeCase:function (str, type) { type = type || 4 switch (type) { case 1: return str.replace(/\b\w+\b/g, function (word) { return word.substring(0, 1).toUpperCase() + word.substring(1).toLowerCase(); }); case 2: return str.replace(/\b\w+\b/g, function (word) { return word.substring(0, 1).toLowerCase() + word.substring(1).toUpperCase(); }); case 3: return str.split('').map( function(word){ if (/[a-z]/.test(word)) { return word.toUpperCase(); }else{ return word.toLowerCase() } }).join('') case 4: return str.toUpperCase(); case 5: return str.toLowerCase(); default: return str; } }, /* 检测明码强度 */ checkPwd:function (str) { var Lv = 0; if (str.length < 6) { return Lv } if (/[0-9]/.test(str)) { Lv++ } if (/[a-z]/.test(str)) { Lv++ } if (/[A-Z]/.test(str)) { Lv++ } if (/[\.|-|_]/.test(str)) { Lv++ } return Lv; }, /*过滤html代码(把<>转换)*/ filterTag:function (str) { str = str.replace(/&/ig, "&"); str = str.replace(/</ig, "<"); str = str.replace(/>/ig, ">"); str = str.replace(" ", " "); return str; }} var KenNumber ={ /*随机数范畴*/ random:function(min, max) { if (arguments.length === 2) { return Math.floor(min + Math.random() * ( (max+1) - min )) }else{ return null; } }, /*将阿拉伯数字翻译成中文的大写数字*/ numberToChinese:function (num) { var AA = new Array("零", "一", "二", "三", "四", "五", "六", "七", "八", "九", "十"); var BB = new Array("", "十", "百", "仟", "萬", "億", "点", ""); var a = ("" + num).replace(/(^0*)/g, "").split("."), k = 0, re = ""; for(var i = a[0].length - 1; i >= 0; i--) { switch(k) { case 0: re = BB[7] + re; break; case 4: if(!new RegExp("0{4}//d{" + (a[0].length - i - 1) + "}$") .test(a[0])) re = BB[4] + re; break; case 8: re = BB[5] + re; BB[7] = BB[5]; k = 0; break; } if(k % 4 == 2 && a[0].charAt(i + 2) != 0 && a[0].charAt(i + 1) == 0) re = AA[0] + re; if(a[0].charAt(i) != 0) re = AA[a[0].charAt(i)] + BB[k % 4] + re; k++; } if(a.length > 1) // 加上小数局部(如果有小数局部) { re += BB[6]; for(var i = 0; i < a[1].length; i++) re += AA[a[1].charAt(i)]; } if(re == '一十') re = "十"; if(re.match(/^一/) && re.length == 3) re = re.replace("一", ""); return re; }, /*将数字转换为大写金额*/ changeToChinese:function (Num) { //判断如果传递进来的不是字符的话转换为字符 if(typeof Num == "number") { Num = new String(Num); }; Num = Num.replace(/,/g, "") //替换tomoney()中的“,” Num = Num.replace(/ /g, "") //替换tomoney()中的空格 Num = Num.replace(/￥/g, "") //替换掉可能呈现的￥字符 if(isNaN(Num)) { //验证输出的字符是否为数字 //alert("请查看小写金额是否正确"); return ""; }; //字符处理完毕后开始转换，采纳前后两局部别离转换 var part = String(Num).split("."); var newchar = ""; //小数点前进行转化 for(var i = part[0].length - 1; i >= 0; i--) { if(part[0].length > 10) { return ""; //若数量超过拾亿单位，提醒 } var tmpnewchar = "" var perchar = part[0].charAt(i); switch(perchar) { case "0": tmpnewchar = "零" + tmpnewchar; break; case "1": tmpnewchar = "壹" + tmpnewchar; break; case "2": tmpnewchar = "贰" + tmpnewchar; break; case "3": tmpnewchar = "叁" + tmpnewchar; break; case "4": tmpnewchar = "肆" + tmpnewchar; break; case "5": tmpnewchar = "伍" + tmpnewchar; break; case "6": tmpnewchar = "陆" + tmpnewchar; break; case "7": tmpnewchar = "柒" + tmpnewchar; break; case "8": tmpnewchar = "捌" + tmpnewchar; break; case "9": tmpnewchar = "玖" + tmpnewchar; break; } switch(part[0].length - i - 1) { case 0: tmpnewchar = tmpnewchar + "元"; break; case 1: if(perchar != 0) tmpnewchar = tmpnewchar + "拾"; break; case 2: if(perchar != 0) tmpnewchar = tmpnewchar + "佰"; break; case 3: if(perchar != 0) tmpnewchar = tmpnewchar + "仟"; break; case 4: tmpnewchar = tmpnewchar + "万"; break; case 5: if(perchar != 0) tmpnewchar = tmpnewchar + "拾"; break; case 6: if(perchar != 0) tmpnewchar = tmpnewchar + "佰"; break; case 7: if(perchar != 0) tmpnewchar = tmpnewchar + "仟"; break; case 8: tmpnewchar = tmpnewchar + "亿"; break; case 9: tmpnewchar = tmpnewchar + "拾"; break; } var newchar = tmpnewchar + newchar; } //小数点之后进行转化 if(Num.indexOf(".") != -1) { if(part[1].length > 2) { // alert("小数点之后只能保留两位,零碎将主动截断"); part[1] = part[1].substr(0, 2) } for(i = 0; i < part[1].length; i++) { tmpnewchar = "" perchar = part[1].charAt(i) switch(perchar) { case "0": tmpnewchar = "零" + tmpnewchar; break; case "1": tmpnewchar = "壹" + tmpnewchar; break; case "2": tmpnewchar = "贰" + tmpnewchar; break; case "3": tmpnewchar = "叁" + tmpnewchar; break; case "4": tmpnewchar = "肆" + tmpnewchar; break; case "5": tmpnewchar = "伍" + tmpnewchar; break; case "6": tmpnewchar = "陆" + tmpnewchar; break; case "7": tmpnewchar = "柒" + tmpnewchar; break; case "8": tmpnewchar = "捌" + tmpnewchar; break; case "9": tmpnewchar = "玖" + tmpnewchar; break; } if(i == 0) tmpnewchar = tmpnewchar + "角"; if(i == 1) tmpnewchar = tmpnewchar + "分"; newchar = newchar + tmpnewchar; } } //替换所有无用汉字 while(newchar.search("零零") != -1) newchar = newchar.replace("零零", "零"); newchar = newchar.replace("零亿", "亿"); newchar = newchar.replace("亿万", "亿"); newchar = newchar.replace("零万", "万"); newchar = newchar.replace("零元", "元"); newchar = newchar.replace("零角", ""); newchar = newchar.replace("零分", ""); if(newchar.charAt(newchar.length - 1) == "元") { newchar = newchar + "整" } return newchar; }, /** 给输出数字的输入框当初 小数点数和长度 是否为正数 * 20161230 cuis 小数点保留两位，总长度默认13，能够传入总长度 * * @param obj * 控件对象 * @param floatNum * 小数点保留位数 1~6, 最多准确到小数点6位 0示意不能有小数 * @param maxLength * 默认最大长度 默认长度13 * @param minus * 是否容许为正数 true为容许为正数，false为不容许为正数 */ floatNumberCheck :function(obj, floatNum, maxLength, minus) { if (minus == undefined || minus == null || minus == '') { minus = false; } if (maxLength == undefined || maxLength == null || maxLength == '') { maxLength = 13; } if (floatNum == undefined || floatNum == null) { floatNum = 2; } if (minus == true) { obj.value = obj.value.replace(/[^\d.-]/g, ""); // 革除“数字”和“.” "-"以外的字符 // 仅仅只能第一个字符为负 if (obj.value.substr(0, 1) == '-') { obj.value = '-' + obj.value.substr(1, maxLength).replace(/[^\d.]/g, ""); } } else { obj.value = obj.value.replace(/[^\d.]/g, ""); // 革除“数字”和“.” 以外的字符 } if (obj.value != 0 && obj.value.indexOf(".") == -1 && obj.value.substr(0, 1) == 0) { obj.value = obj.value.substr(1); } obj.value = obj.value.replace(/\.{2,}/g, "."); // 只保留第一个. 革除多余的 // obj.value = obj.value.replace(".", "$#$").replace(/\./g, "").replace("$#$", "."); // obj.value = // obj.value.replace(/^(\-)*(\d+)\.(\d\d).*$/,'$1$2.$3');//只能输出两个小数 if (floatNum == 2) { obj.value = obj.value.replace(/^(\-)*(\d+)\.(\d\d).*$/, '$1$2.$3'); // 只能输出两个小数 } else if (floatNum == 1) { obj.value = obj.value.replace(/^(\-)*(\d+)\.(\d).*$/, '$1$2.$3'); // } else if (floatNum == 3) { obj.value = obj.value.replace(/^(\-)*(\d+)\.(\d\d\d).*$/, '$1$2.$3'); // } else if (floatNum == 4) { obj.value = obj.value.replace(/^(\-)*(\d+)\.(\d\d\d\d).*$/, '$1$2.$3'); // } else if (floatNum == 5) { obj.value = obj.value.replace(/^(\-)*(\d+)\.(\d\d\d\d\d).*$/, '$1$2.$3'); // } else if (floatNum == 6) { obj.value = obj.value.replace(/^(\-)*(\d+)\.(\d\d\d\d\d\d).*$/, '$1$2.$3'); // } else if (floatNum == 0) { obj.value = obj.value.replace(/\./g, ""); // } else { obj.value = obj.value.replace(/^(\-)*(\d+)\.(\d\d).*$/, '$1$2.$3'); // 只能输出两个小数 } if (obj.value.length >= maxLength) { obj.value = obj.value.substr(0, maxLength); } }} var KenDom ={ $:function(selector){ var type = selector.substring(0, 1); if (type === '#') { if (document.querySelecotor) return document.querySelector(selector) return document.getElementById(selector.substring(1)) }else if (type === '.') { if (document.querySelecotorAll) return document.querySelectorAll(selector) return document.getElementsByClassName(selector.substring(1)) }else{ return document['querySelectorAll' ? 'querySelectorAll':'getElementsByTagName'](selector) } }, /*检测类名*/ hasClass:function(ele, name) { return ele.className.match(new RegExp('(\\s|^)' + name + '(\\s|$)')); }, /*增加类名*/ addClass:function (ele, name) { if (!this.hasClass(ele, name)) ele.className += " " + name; }, /*删除类名*/ removeClass:function (ele, name) { if (this.hasClass(ele, name)) { var reg = new RegExp('(\\s|^)' + name + '(\\s|$)'); ele.className = ele.className.replace(reg, ''); } }, /*替换类名*/ replaceClass:function (ele, newName, oldName) { this.removeClass(ele, oldName); this.addClass(ele, newName); }, /*获取兄弟节点 ele具备唯一性*/ siblings:function (ele) { console.log(ele.parentNode) var chid = ele.parentNode.children,eleMatch = []; for(var i = 0, len = chid.length; i < len; i ++){ if(chid[i] != ele){ eleMatch.push(chid[i]); } } return eleMatch; }, /*获取行间款式属性*/ getByStyle:function (obj,name){ if(obj.currentStyle){ return obj.currentStyle[name]; }else{ return getComputedStyle(obj,false)[name]; } }, /*DOM转字符串*/ domToStirng:function(htmlDOM) { var div = document.createElement("div"); div.appendChild(htmlDOM); return div.innerHTML }, /*字符串转DOM*/ stringToDom:function(htmlString) { var div = document.createElement("div"); div.innerHTML = htmlString; return div.children[0]; }, /** * 光标所在位置插入字符，并设置光标地位 * * @param {dom} 输入框 * @param {val} 插入的值 * @param {posLen} 光标地位处在 插入的值的哪个地位 */ setCursorPosition:function(dom, val, posLen) { var cursorPosition = 0; if (dom.selectionStart) { cursorPosition = dom.selectionStart; } this.insertAtCursor(dom, val); dom.focus(); console.log(posLen) dom.setSelectionRange(dom.value.length, cursorPosition + (posLen || val.length)); }, /*光标所在位置插入字符*/ insertAtCursor:function(dom, val) { if (document.selection) { dom.focus(); sel = document.selection.createRange(); sel.text = val; sel.select(); } else if (dom.selectionStart || dom.selectionStart == '0') { let startPos = dom.selectionStart; let endPos = dom.selectionEnd; let restoreTop = dom.scrollTop; dom.value = dom.value.substring(0, startPos) + val + dom.value.substring(endPos, dom.value.length); if (restoreTop > 0) { dom.scrollTop = restoreTop; } dom.focus(); dom.selectionStart = startPos + val.length; dom.selectionEnd = startPos + val.length; } else { dom.value += val; dom.focus(); } }} /*图片加载*//** * @param {Object} arr 图片src地址 * @param 数组单个对象属性 这个属性值是src地址 如果fieldName为空 则认为arr是纯数组 * @param {Object} callback 回调办法 */function imgLoadAll(arr,fieldName,callback){ var arrImg = []; for (var i = 0; i < arr.length; i++) { var img = new Image(); img.src = fieldName?arr[i][fieldName]:arr[i]; img.onload = function(){ arrImg.push(this); if (arrImg.length == arr.length) { callback && callback(arrImg); } } }} /*音频加载*//** * @param {Object} src 音频src地址 * @param {Object} callback 回调办法 */function loadAudio(src, callback) { var audio = new Audio(src); audio.onloadedmetadata = callback; audio.src = src;}源码地址：点击
注：大部分的办法起源程序猿dd的博客。
本文来源于：宋文超super，专属平台有csdn、思否(SegmentFault)、 简书、 开源中国(oschina)，转载请注明出处。